.auth-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(160deg, var(--color-black) 0%, var(--color-black) 38%, var(--color-bg) 38%);
    padding: 1rem;
}

.auth-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 2.4rem 2.2rem;
    width: 100%;
    max-width: 400px;
}

.auth-logo { font-size: 2.6rem; text-align: center; margin-bottom: .25rem; }

.auth-title { text-align: center; color: var(--color-black); font-size: 1.5rem; }

.auth-subtitle { text-align: center; color: var(--color-text-soft); margin-bottom: 1.5rem; font-size: .92rem; }

.auth-form .btn { margin-top: .5rem; }

.install-fieldset .form-row { flex-wrap: wrap; }

@media (max-width: 480px) {
    .auth-card { padding: 1.8rem 1.4rem; }
}